[INFO] updating cached repository https://github.com/bunnymatic/histogram-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5e785041e235e03fbec69320e6803972576fde4d
[INFO] checking bunnymatic/histogram-rust against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbunnymatic%2Fhistogram-rust" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bunnymatic/histogram-rust on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bunnymatic/histogram-rust
[INFO] finished tweaking git repo https://github.com/bunnymatic/histogram-rust
[INFO] tweaked toml for git repo https://github.com/bunnymatic/histogram-rust written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/bunnymatic/histogram-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2d26d054dd8623c76a29497f8b6b234b8cd4b600fb0f30cc7ff25199cb1b11bc
[INFO] running `"docker" "start" "-a" "2d26d054dd8623c76a29497f8b6b234b8cd4b600fb0f30cc7ff25199cb1b11bc"`
[INFO] [stderr]    Compiling structopt-derive v0.2.17
[INFO] [stderr]     Checking structopt v0.2.17
[INFO] [stderr]     Checking histogram v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: unknown start of token: \
[INFO] [stderr]   --> src/main.rs:24:42
[INFO] [stderr]    |
[INFO] [stderr] 24 |         let words = line.unwrap().split(/\s+/);
[INFO] [stderr]    |                                          ^
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found `/`
[INFO] [stderr]   --> src/main.rs:24:41
[INFO] [stderr]    |
[INFO] [stderr] 24 |         let words = line.unwrap().split(/\s+/);
[INFO] [stderr]    |                                         ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: unknown start of token: \
[INFO] [stderr]   --> src/main.rs:24:42
[INFO] [stderr]    |
[INFO] [stderr] 24 |         let words = line.unwrap().split(/\s+/);
[INFO] [stderr]    |                                          ^
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found `/`
[INFO] [stderr]   --> src/main.rs:24:41
[INFO] [stderr]    |
[INFO] [stderr] 24 |         let words = line.unwrap().split(/\s+/);
[INFO] [stderr]    |                                         ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `File`
[INFO] [stderr]   --> src/main.rs:20:14
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let fp = File::open(opt.file).unwrap();
[INFO] [stderr]    |              ^^^^ use of undeclared type or module `File`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `BufReader`
[INFO] [stderr]   --> src/main.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let file = BufReader::new(&f);
[INFO] [stderr]    |                ^^^^^^^^^ use of undeclared type or module `BufReader`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `f` in this scope
[INFO] [stderr]   --> src/main.rs:22:32
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let file = BufReader::new(&f);
[INFO] [stderr]    |                                ^ help: a local variable with a similar name exists: `fp`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `histogram`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `File`
[INFO] [stderr]   --> src/main.rs:20:14
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let fp = File::open(opt.file).unwrap();
[INFO] [stderr]    |              ^^^^ use of undeclared type or module `File`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `BufReader`
[INFO] [stderr]   --> src/main.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let file = BufReader::new(&f);
[INFO] [stderr]    |                ^^^^^^^^^ use of undeclared type or module `BufReader`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `f` in this scope
[INFO] [stderr]   --> src/main.rs:22:32
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let file = BufReader::new(&f);
[INFO] [stderr]    |                                ^ help: a local variable with a similar name exists: `fp`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `histogram`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2d26d054dd8623c76a29497f8b6b234b8cd4b600fb0f30cc7ff25199cb1b11bc"`
[INFO] running `"docker" "rm" "-f" "2d26d054dd8623c76a29497f8b6b234b8cd4b600fb0f30cc7ff25199cb1b11bc"`
[INFO] [stdout] 2d26d054dd8623c76a29497f8b6b234b8cd4b600fb0f30cc7ff25199cb1b11bc